HiIs there a CUC in the tank?
I never got green rocks in my setup with Dry rock, they got the brown stuff.
Then again i never had the bioload you have during the cycle either.
Are the Tangs picking at it?
Once the next phase kicks in i imagine it will clear up.
What are you nutrient readings like?
This is gonna be one sweet looking tank once corals go in.
I don't know to be honestBecause i cant tell from the close up photo, am i right that there appears to be GHA?
Otherwise, it 'could' be green coralline..... or both, just a thought.
Tons better thanksHows the tank going along @Lesley